Ucf Location Constraints; Address; Data - Xilinx Spartan-3E User Manual

Chapter 13: DDR SDRAM

UCF Location Constraints

Address

Figure 13-2
address pins, including the I/O pin assignment and the I/O standard used.

Data

Figure 13-3
pins, including the I/O pin assignment and I/O standard used.
106
provides the User Constraint File (UCF) constraints for the DDR SDRAM
NET "SD_A<12>" LOC = "P2" |
NET "SD_A<11>" LOC = "N5" |
NET "SD_A<10>" LOC = "T2" |
NET "SD_A<9>" LOC = "N4" |
NET "SD_A<8>" LOC = "H2" |
NET "SD_A<7>" LOC = "H1" |
NET "SD_A<6>" LOC = "H3" |
NET "SD_A<5>" LOC = "H4" |
NET "SD_A<4>" LOC = "F4" |
NET "SD_A<3>" LOC = "P1" |
NET "SD_A<2>" LOC = "R2" |
NET "SD_A<1>" LOC = "R3" |
NET "SD_A<0>" LOC = "T1" |
Figure 13-2: UCF Location Constraints for DDR SDRAM Address Inputs
provides the User Constraint File (UCF) constraints for the DDR SDRAM data
NET "SD_DQ<15>" LOC = "H5" |
NET "SD_DQ<14>" LOC = "H6" |
NET "SD_DQ<13>" LOC = "G5" |
NET "SD_DQ<12>" LOC = "G6" |
NET "SD_DQ<11>" LOC = "F2" |
NET "SD_DQ<10>" LOC = "F1" |
NET "SD_DQ<9>" LOC = "E1" |
NET "SD_DQ<8>" LOC = "E2" |
NET "SD_DQ<7>" LOC = "M6" |
NET "SD_DQ<6>" LOC = "M5" |
NET "SD_DQ<5>" LOC = "M4" |
NET "SD_DQ<4>" LOC = "M3" |
NET "SD_DQ<3>" LOC = "L4" |
NET "SD_DQ<2>" LOC = "L3" |
NET "SD_DQ<1>" LOC = "L1" |
NET "SD_DQ<0>" LOC = "L2" |
Figure 13-3: UCF Location Constraints for DDR SDRAM Data I/Os
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IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
IOSTANDARD = SSTL2_I ;
Spartan-3E Starter Kit Board User Guide
UG230 (v1.0) March 9, 2006
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